New Delhi, Nov. 5 -- Delhi continues to battle toxic air and a thick blanket of smog, making it difficult for people to breathe. Dr Randeep Guleria, Chairman of the Institute of Internal Medicine, Respiratory and Sleep Medicine at Medanta, Gurugram, warned that air pollution acts as a silent killer by worsening existing diseases and other health problems.

Speaking exclusively to ANI, Guleria said, "Air pollution is a silent killer; it kills by worsening underlying diseases and other health problems."

Guleria said the Air Quality Index (AQI) had reached the severe and very severe categories, posing a serious risk to people with chronic respiratory and heart diseases, children and the elderly.

"The AQI has now reached the severe or very ...